Evgeny Kabantsev toorosan

Demo:

Spoiler warning

Spoiler text. Note that it's important to have a space after the summary tag. You should be able to write any markdown you want inside the <details> tag... just make sure you close <details> afterward.

console.log("I'm a code block!");

How to use PlantUML with Markdown

PlantUML is a really awesome way to create diagrams by writing code instead of drawing and dragging visual elements. Markdown is a really nice documentation tool.

Here's how I combine the two, to create docs with embedded diagrams.

Step 0: Setup

Get the command-line PlantUML from the download page or your relevant package manager.

How to install virtualenv:

Install pip first

sudo apt-get install python3-pip

Then install virtualenv using pip3

sudo pip3 install virtualenv

The mini-tool has a CLI-Interface with the following options:

Unicast or Multicast? Default: Unicast
Locally Administered or Globally Unique? Default: Locally Administered
Prescribe specific OUI (overwrites the above two)

TODO

Add an option to generate a number of MACs without collisions.

Moved to git repository: https://github.com/denji/golang-tls

Generate private key (.key)

# Key considerations for algorithm "RSA" ≥ 2048-bit
openssl genrsa -out server.key 2048

# Key considerations for algorithm "ECDSA" ≥ secp384r1
# List ECDSA the supported curves (openssl ecparam -list_curves)

Setup

Add this to your .profile, .bashrc, .zshrc...

decode_base64_url() {
  local len=$((${#1} % 4))
  local result="$1"
  if [ $len -eq 2 ]; then result="$1"'=='
  elif [ $len -eq 3 ]; then result="$1"'=' 
  fi
 echo "$result" | tr '_-' '/+' | openssl enc -d -base64

	package main

	// reference: https://golang.org/pkg/crypto/des/
	// reference: http://blog.studygolang.com/2013/01/go%E5%8A%A0%E5%AF%86%E8%A7%A3%E5%AF%86%E4%B9%8Bdes/

	import (
	"crypto/cipher"
	"crypto/des"
	"encoding/base64"
	"encoding/json"

	// Chained functions.
	type Chained struct {
	someUpdatedValue string
	}

	// ModifyFunction1 makes concatenation of someUpdatedValue and s, divided by "+"
	func (c Chained) ModifyFunction1(s string) Chained {
	return Chained{someUpdatedValue: c.someUpdatedValue + "+" + s}
	}

	#!/bin/bash
	# bash generate random alphanumeric string
	#

	# bash generate random 32 character alphanumeric string (upper and lowercase) and
	NEW_UUID=$(cat /dev/urandom \| tr -dc 'a-zA-Z0-9' \| fold -w 32 \| head -n 1)

	# bash generate random 32 character alphanumeric string (lowercase only)
	cat /dev/urandom \| tr -dc 'a-zA-Z0-9' \| fold -w 32 \| head -n 1

	package main

	import (
	"context"
	"fmt"
	"net"
	"net/http"
	"os"
	"os/exec"
	"os/signal"